Gas-burning furnace.



E. P. GWYNN.

GAS BURNING FURNACE. APPLICATION FILED MAR-21, 1910 Patented Dec. 29, 1914.

THE NORRIS PETERS co F'HOTO-LITHKI. wAsHIrvGmN. D C.

Specification of Letters Patent.

EMMER F. GWYNN, OF IEITTSBURGH, PENNSYLVANIA.

GAS-BURNING FURNACE.

Patented 113cc 29, 1914..

Application filed March 21, 1910. Serial No. 550,743.

To all whom it may concern Be it known that I, EMMER a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, and a citizen of the United States, have invented a new and useful Improvement in Gas-Burning Furnaces, of which the following is aspecification.

This invention relates to furnaces, and more particularly to furnaces for use with steam boilers, and steam, hot water and hot air heating systems.

The object of the invention is to provide a furnace construction whereby substantially complete combustion is secured and a very large number of heat units of the fuel utilized.

More specifically, the object of the invention is to provide a furnace to be used un der steam boilers or in connection with steam and water boilers and hot air furnaces wherein the gases produced by the combustion of the fuel do not come into contact with cooling surfaces, such as water walls or tubes, until complete combustion of the fuel has been effected. This is effected by providing extended passages between the burner and the heat absorbing device or chamber, said passages being constructed of material which prevents the ah sorption of heat and becomes incandescent, so that thereby a very high temperature is maintained in order that the combustion. may become practically complete prior to the contact of the gases with any cooling surfaces whatsoever.

In the accompanying drawings, Figure 7 1 is a vertical section through a boiler showing my improved arrangement applied thereto, and Fig. 2 is a horizontal section on the line 2-42, Fig. 1.

The heat absorbing or utilizing device may be of any desired form. In the drawings it is shown as a cast iron sectional boiler composed of the sections 1 having extending through the same the necessary flues for the hot products of combustion. As shown, there is a passage or chamber 2 extending through the upper part of the boiler sections. The forwardly extending flue 3 communicate with other flues extending toward the rear and from thence to the stack as is usually the case with this type of boilers. This, however, has not been shown, as my improved furnace can be used with any type of heat absorbing de- F. GWYNN,

top wall 8.

vice or heat absorbing chamber. The boiler, of course, is inclosed in a suitable setting or casing.

The furnace, which is shown located beneath a boiler and extending the length thereof, comprises an arrangement of combustion passages placed side by side on a horizontal plane. The furnace comprises suitable burners, shown at 5, arranged to project the products of combustion into a central combustion passage 6 which extends practically the entire length of the furnace. This central passage is divided from the side combustion passages 7 by vertical walls 8. At the rear of the furnace the central passage and side passages communicate through openings 9*, and at their forward ends the side combustion passages communicate through openings 1O with the heat absorbing chamber or passage 2 in the boiler. The furnace has side walls 4, a bottom wall 6, and wall 7, and The burning gas which is forced into the central combustion passage 6 passes therealong, and impinging against the rear wall is divided into two streams, which pass along the side passages toward the furnace front. At the forward end of the side passages the products of combustion enter the heat absorbing chamber.

As all of the furnace walls are formed of brick work or the like, they possess to a high degree the capacity of becoming incandescent and retaining the heat in the combustion passage. As a. consequence, the gas has no opportunity to cool, but on the contrary the heat increases as the gases pass through the central and side passages, said gas attaining such a high temperature that practically complete combustion is effected before coming into contact with any cooling surfaces whatsoever. Hence, the gases entering the heat absorbing chamber 2 are practically pure carbon dioXid and other incombustible gases having a very high temperature. In other words, the radiated heat of the walls effectually ignites all fuel which may not have been ignited in the initial jet, and because of this complete combustion all of the heat units of the fuel are freed, and a very hot gas brought into contact with the cooling or heat absorbing devices. Hence, the furnace is much more effective and economical than furnaces as heretofore constructed, in which the gases of combustion are allowed to come into can I tact with cooling surfaces before complete combustion is attained, thereby preventing the gases attaining a sufficiently "high tern perature to effect complete combustion,

What I claim is The combination of a heat absorbing chamber and a furnace having fuel intro ducing means in one end thereof, said furnace comprising a plurality of vertically disposed fuel guiding and heat retaining Walls forming'a fuel combustion passage leading rearwardly from the fuel introduce ing means, and outer combustion passages connected at their rearward ends with said central passage and at their forward ends Copies of this patent maybe obtained for five cents each, by addressing the Washington, D. 0.

F; GWYNN. Witnesses F, W. WI TER, JAs. L. WELDON.

Commissioner of Patents,

thorough combustion of 

